[原創] ImportError: cannot import name 'NoValue'

調用python腳本時，如下錯誤：

Traceback (most recent call last):
  File "./wtLdap.py", line 5, in <module>
    from ldap3 import Connection, MODIFY_REPLACE, SUBTREE, ALL_ATTRIBUTES
  File "/home/wtadmin/.local/lib/python3.5/site-packages/ldap3/__init__.py", line 138, in <module>
    from .core.connection import Connection
  File "/home/wtadmin/.local/lib/python3.5/site-packages/ldap3/core/connection.py", line 37, in <module>
    from ..extend import ExtendedOperationsRoot
  File "/home/wtadmin/.local/lib/python3.5/site-packages/ldap3/extend/__init__.py", line 45, in <module>
    from .standard.whoAmI import WhoAmI
  File "/home/wtadmin/.local/lib/python3.5/site-packages/ldap3/extend/standard/whoAmI.py", line 27, in <module>
    from pyasn1.type.univ import NoValue
ImportError: cannot import name 'NoValue'
 

原因是 pyasn1 庫的版本問題導致，更新爲如下版本即可：

pip3 install pyasn1==0.3.7

如果提示：

Could not install packages due to an EnvironmentError: [Errno 13] Permission denied: '__init__.py'
Consider using the `--user` option or check the permissions.
則 增加 --user 參數即可。

pip3 install --user pyasn1==0.3.7